No. Registros Solicitud 1 5614 colombia

CC - CATEGORY CODES: 30-Engineering-geology

DT - DOCUMENT TYPE: Serial; Conference-Document

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 9; illus. incl. 4 tables.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

CO - CODEN: #01720

AN - ACCESSION NUMBER: 1995-058381

UD - UPDATE CODE: 199521

Registro 4969 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Geological hazard and risk evaluation using GIS; methodology and model applied to Medellin, Colombia.

AU - AUTHORS: Mejia-Navarro-Mario; Wohl-Ellen-E

AF - AUTHOR AFFILIATION: Colorado State University, Department of Earth Resources, Fort Collins, CO, United States

SO - SOURCE: Bulletin of the Association of Engineering Geologists. 31; 4, Pages 459-481. 1994.

PB - PUBLISHER: Association of Engineering Geologists. Dallas, TX, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

DE - DESCRIPTORS: computer-programs; data-processing; erosion-; geographic-information-systems; geologic-hazards; GRASS-; information-systems; land-use; landslides-; mass-movements; Medellin-Colombia; models-; slope-stability

CC - CATEGORY CODES: 30-Engineering-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 41; 3 tables, sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0004-5691

CO - CODEN: ENGEA9

AN - ACCESSION NUMBER: 1995-060550

UD - UPDATE CODE: 199521

Registro 4970 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Relation of unit gravel discharge to mean velocity.

AU - AUTHORS: Posada-G-Lilian; Nordin-Carl-F Jr.

AF - AUTHOR AFFILIATION: Universidad Nacional de Colombia, Civil Engineering, Medellin, Colombia

BK - BOOK TITLE: In: Hydraulic engineering '94.

BA - BOOK AUTHORS: Cotroneo-George-V (editor); Rumer-Ralph-R (editor)

SO - SOURCE: Hydraulic Engineering: Proceedings of the National Conference on Hydraulic Engineering. 1994; Pages 1050-1054. 1994.

PB - PUBLISHER: American Society of Civil Engineers. Hydraulics Division. New York, NY, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

CN - CONFERENCE INFORMATION: 1994 ASCE national conference on Hydraulic engineering. Buffalo, NY, United States. Aug. 1-5, 1994.

LA - LANGUAGE: English

DE - DESCRIPTORS: clastic-sediments; discharge-; fluvial-features; gravel-; hydrodynamics-; sand-; sediment-transport; sediments-; stream-transport; streams-; velocity-

CC - CATEGORY CODES: 21-Hydrogeology

DT - DOCUMENT TYPE: Serial; Conference-Document

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 10; illus.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 1070-1559

IB - ISBN: 0-7844-0037-7

AN - ACCESSION NUMBER: 1995-061079

UD - UPDATE CODE: 199521

Registro 4971 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Teleseismic analysis of the Great 1994 Bolivia earthquake.

AU - AUTHORS: Ekstrom-Goran

AF - AUTHOR AFFILIATION: Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States

BK - BOOK TITLE: In: AGU 1994 fall meeting.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Eos, Transactions, American Geophysical Union. 75; 44, Suppl., Pages 465. 1994.

PB - PUBLISHER: American Geophysical Union. Washington, DC, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

CN - CONFERENCE INFORMATION: American Geophysical Union, 1994 fall meeting. San Francisco, CA, United States. Dec 5-9, 1994.

LA - LANGUAGE: English

DE - DESCRIPTORS: body-waves; Bolivia-; Bolivia-earthquake-1994; Colombia-earthquake-1970; deep-focus-earthquakes; earthquakes-; elastic-waves; long-period-waves; mantle-; mapping-; numerical-analysis; P-waves; rupture-; seismic-moment; seismic-waves; seismograms-; South-America; teleseismic-signals; time-factor

CC - CATEGORY CODES: 19-Seismology

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0096-3941

CO - CODEN: EOSTAJ

AN - ACCESSION NUMBER: 1995-065072

UD - UPDATE CODE: 199523

Registro 4972 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Modelling spatial variations of soil compaction in the Guaviare colonization area, Colombian Amazonia.

AU - AUTHORS: Martinez-M-Luis-Joel; Zinck-J-Alfred

AF - AUTHOR AFFILIATION: ITC, Tropenbos-Colombia Programme, Santafe de Bogota, Colombia

BK - BOOK TITLE: In: Special GIS issue; Latin America.

BA - BOOK AUTHORS: Valenzuela-Carlos-R (editor)

SO - SOURCE: ITC Journal = Bulletin de l'ITC. 1994-3; Pages 252-263. 1994.

PB - PUBLISHER: International Institute for Aerial Survey and Earth Sciences. Enschede, Netherlands. 1994.

CP - COUNTRY OF PUBLICATION: Netherlands

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

LS - LANGUAGE OF SUMMARY: French; Spanish

DE - DESCRIPTORS: Amazon-Basin; Colombia-; compaction-; deforestation-; degradation-; drainage-; erosion-; forests-; Guaviare-colonization-area; human-activity; landform-evolution; models-; physical-properties; soils-; South-America; spatial-variations; statistical-analysis; tropical-environment; variance-analysis; variograms-; vegetation-

CC - CATEGORY CODES: 25-Soils

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 36; illus. incl. 1 table, sketch map.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0303-2434

AN - ACCESSION NUMBER: 1995-065161

UD - UPDATE CODE: 199523

Registro 4973 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Evaluating the use of training areas in bivariate statistical landslide hazard analysis; a case study in Colombia.

AU - AUTHORS: Naranjo-Jose-Luis; van-Westen-Cees-J; Soeters-Robert

AF - AUTHOR AFFILIATION: Universidad de Caldas, Facultad de Geologia y Minas, Manizales, Colombia

BK - BOOK TITLE: In: Special GIS issue; Latin America.

BA - BOOK AUTHORS: Valenzuela-Carlos-R (editor)

SO - SOURCE: ITC Journal = Bulletin de l'ITC. 1994-3; Pages 292-300. 1994.

PB - PUBLISHER: International Institute for Aerial Survey and Earth Sciences. Enschede, Netherlands. 1994.

CP - COUNTRY OF PUBLICATION: Netherlands

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

LS - LANGUAGE OF SUMMARY: French; Spanish

DE - DESCRIPTORS: accuracy-; Andes-; bivariate-analysis; Caldas-Colombia; Chinchina-Colombia; Colombia-; erosion-features; geologic-hazards; landform-evolution; landslides-; mass-movements; methods-; prediction-; Risaralda-Colombia; risk-assessment; Santa-Rosa-Colombia; South-America; spatial-distribution; statistical-analysis

CC - CATEGORY CODES: 22-Environmental-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 8; illus. incl. block diags., 4 tables, sketch map.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0303-2434

AN - ACCESSION NUMBER: 1995-065164

UD - UPDATE CODE: 199523

Registro 4974 de 5614 - GeoRef Disc 4: 1993-1996

BK - BOOK TITLE: Comparative planktonic foraminiferal biostratigraphy of the Colombia Basin and Northeast Gulf of Mexico.

BA - BOOK AUTHORS: Fletcher-Ruth-Reilly

RP - RESEARCH PROGRAM: DSDP (Deep Sea Drilling Project | ODP (Ocean Drilling Program)

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

DG - DEGREE GRANTED: Doctoral

DI - DEGREE GRANTING INSTITUTION: University of Delaware. Newark, DE, United States. Pages: 639. 1994.

LA - LANGUAGE: English

DE - DESCRIPTORS: Atlantic-Ocean; biostratigraphy-; Caribbean-Sea; Cenozoic-; Central-America; coiling-; Colombian-Basin; correlation-; Deep-Sea-Drilling-Project; DSDP-Site-502; Foraminifera-; Gulf-of-Mexico; Invertebrata-; IPOD-; Leg-100; Leg-68; microfossils-; Neogene-; North-Atlantic; northeastern-Gulf-of-Mexico; Ocean-Drilling-Program; ODP-Site-625; Pacific-Ocean; paleo-oceanography; paleomagnetism-; paleosalinity-; Panama-; planktonic-taxa; Pliocene-; Protista-; sea-water; sedimentation-rates; Tertiary-

CC - CATEGORY CODES: 12-Stratigraphy

DT - DOCUMENT TYPE: Thesis-or-Dissertation

BL - BIB LEVEL: Monograph

NN - ANNOTATION: In two volumes.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

AV - AVAILABILITY: University Microfilms, Ann Arbor, MI, United States

AN - ACCESSION NUMBER: 1996-001598

UD - UPDATE CODE: 199601

Registro 4975 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: VSPs in complex structures in Colombia.

AU - AUTHORS: Knight-Jonathan; Burke-Nick; Begg-Paul

AF - AUTHOR AFFILIATION: Schlumberger GeoQuest, Bogota, Colombia

BK - BOOK TITLE: In: Society of Exploration Geophysicists, 64th annual international meeting; technical program, expanded abstracts with authors' biographies.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: SEG Annual Meeting Expanded Technical Program Abstracts with Biographies. 64; Pages 121-124. 1994.

PB - PUBLISHER: Society of Exploration Geophysicists. Tulsa, OK, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

CN - CONFERENCE INFORMATION: Society of Exploration Geophysicists, 64th annual international meeting. Los Angeles, CA, United States. Oct. 23-28, 1994.

LA - LANGUAGE: English

AB - ABSTRACT: Vertical Seismic Profiles (VSP's) are used to provide high resolution images around deviated wells in complex geology in Colombia. The VSP images resolve faults and dipping reflectors. Key reflectors below a major reverse fault system, at depths in excess of 12,000 feet can be correlated unambiguously with the conventional 2D seismic data. VSP's also show reflections below the well which are used to establish correlation of the target reflector with the conventional seismic. Where there are no logs, the VSP provides a way to check the depth prognosis. Key markers are tracked across logs to the VSP with the same depth index. On a workstation the VSP images are compared with the surface seismic. Knowing the VSP phase and polarity, and the log correlation, can result in a refinement of the surface seismic interpretation. In some cases faults can be interpreted better on the higher resolution VSP, and the surface seismic interpretation can be refined simultaneously. Key markers below the fault zone appear deeper on the second VSP described than on the surface seismic. The patterns above and below the fault zone can be tied, but a shift is required between the two correlations, due to the difference in the estimates of velocity. Reconciling checkshot information alone with the surface seismic would have been difficult. Better resolution is achieved when migration of the VSP's is based on a simpler model of velocity than one based on the complex geology. In this tectonic setting, it is believed that the real velocity field is more related to current depth rather than strictly to the geological structure.

DE - DESCRIPTORS: Andes-; Colombia-; faults-; geophysical-methods; geophysical-profiles; geophysical-surveys; Northern-Andes; oil-and-gas-fields; petroleum-; petroleum-exploration; reverse-faults; seismic-logging; seismic-methods; seismic-profiles; South-America; structural-traps; surveys-; thrust-faults; traps-; vertical-seismic-profiles; well-logging

CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources; 20-Applied-geophysics

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: illus.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States

IS - ISSN: 1052-3812

AN - ACCESSION NUMBER: 1996-004521

UD - UPDATE CODE: 199602

Registro 4976 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Hazard appraisal and hazard-zone mapping of flooding and debris flowage in the Rio Combeima Valley and Ibague City, Tolima Department, Colombia.

AU - AUTHORS: Thouret-Jean-Claude; Laforge-Christophe

AF - AUTHOR AFFILIATION: Universite Blaise Pascal, CERAMAC, Clermont-Ferrand, France

SO - SOURCE: GeoJournal. 34; 4, Pages 407-413. 1994.

PB - PUBLISHER: Akademische Verlagsgesellschaft. Wiesbaden, Federal Republic of Germany. 1994.

CP - COUNTRY OF PUBLICATION: Federal-Republic-of-Germany

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

DE - DESCRIPTORS: Colombia-; debris-flows; floods-; geologic-hazards; Ibague-Colombia; land-use; mapping-; mass-movements; planning-; Rio-Combeima; risk-assessment; South-America; Tolima-Colombia; volcanoes-

CC - CATEGORY CODES: 22-Environmental-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N042000; N044000; LONG: W0755000; W0760000.

IL - ILLUSTRATION: Refs: 6; illus. incl. 1 table, geol. sketch map.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0343-2521

AN - ACCESSION NUMBER: 1996-008323

UD - UPDATE CODE: 199604

Registro 4977 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Geochronology of basement uplifts in the Colombian Andes and evidence for terrane transfer from NW South America to southern Mexico in mid-Paleozoic time.

AU - AUTHORS: Restrepo-Pace-P; Ruiz-J; Cosca-M

AF - AUTHOR AFFILIATION: University of Arizona, Department of Geosciences, Tucson, AZ, United States

BK - BOOK TITLE: In: AGU 1994 fall meeting.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Eos, Transactions, American Geophysical Union. 75; 44, Suppl., Pages 199. 1994.

PB - PUBLISHER: American Geophysical Union. Washington, DC, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

CN - CONFERENCE INFORMATION: American Geophysical Union, 1994 fall meeting. San Francisco, CA, United States. Dec. 5-9, 1994.

LA - LANGUAGE: English

DE - DESCRIPTORS: absolute-age; Acadian-Phase; Andes-; Ar-Ar; basement-tectonics; Colombia-; dates-; Devonian-; geochronology-; Grenvillian-Orogeny; K-Ar; Mexico-; middle-Paleozoic; Northern-Andes; orogenic-belts; paleogeography-; paleomagnetism-; Paleozoic-; Precambrian-; Rb-Sr; South-America; Taconic-Orogeny; tectonics-; terranes-; uplifts-

CC - CATEGORY CODES: 03-Geochronology; 12-Stratigraphy; 16-Structural-geology

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 1

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0096-3941

CO - CODEN: EOSTAJ

AN - ACCESSION NUMBER: 1996-009413

UD - UPDATE CODE: 199604

Registro 4978 de 5614 - GeoRef Disc 4: 1993-1996

BK - BOOK TITLE: High-resolution stratigraphy, chronology and relative sea level of the Albian-Santonian (Cretaceous) of Colombia.

BA - BOOK AUTHORS: Villamil-Tomas

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

DG - DEGREE GRANTED: Doctoral

DI - DEGREE GRANTING INSTITUTION: University of Colorado. Boulder, CO, United States. Pages: 473. 1994.

LA - LANGUAGE: English

DE - DESCRIPTORS: Albian-; Ammonoidea-; biostratigraphy-; biozones-; Bivalvia-; Cephalopoda-; chronostratigraphy-; Colombia-; Cretaceous-; cycles-; Fischer-plots; Invertebrata-; lithofacies-; Lower-Cretaceous; Mesozoic-; Mollusca-; paleo-oceanography; plate-tectonics; regression-; Santonian-; sea-level-changes; sedimentation-rates; Senonian-; sequence-stratigraphy; South-America; statistical-analysis; stratigraphic-boundary; stratigraphy-; Tetrabranchiata-; thickness-; transgression-; Upper-Cretaceous; upwelling-

CC - CATEGORY CODES: 12-Stratigraphy

DT - DOCUMENT TYPE: Thesis-or-Dissertation

BL - BIB LEVEL: Monograph

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

AV - AVAILABILITY: University Microfilms, Ann Arbor, MI, United States

AN - ACCESSION NUMBER: 1996-011903

UD - UPDATE CODE: 199605

Registro 4979 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: 3-D seismic in mountainous terrain.

AU - AUTHORS: Sixma-E; van-der-Schans-C

AF - AUTHOR AFFILIATION: Shell Venezuela, Maracaibo, Venezuela

BK - BOOK TITLE: In: Society of Exploration Geophysicists, 64th annual international meeting; technical program, expanded abstracts with authors' biographies.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: SEG Annual Meeting Expanded Technical Program Abstracts with Biographies. 64; Pages 1633-1636. 1994.

PB - PUBLISHER: Society of Exploration Geophysicists. Tulsa, OK, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

CN - CONFERENCE INFORMATION: Society of Exploration Geophysicists, 64th annual international meeting. Los Angeles, CA, United States. Oct. 23-28, 1994.

LA - LANGUAGE: English

AB - ABSTRACT: In 1991/92 Shell Colombia successfully conducted two 3D seismic surveys in extremely difficult mountainous terrain and one in an urban area. Numerous cliffs of up to 400 m high and several rivers and canyons cross the first areas, whereas the work in urban area was performed in very poor neighborhoods. We consider work on slopes steeper than 50 degrees inherently unsafe. For urban work it is preferable to not have any cables on the roads. Therefore radio telemetric Opseis 5586 equipment was mobilized. This proved to be the right tool for the occasion, allowing safe and efficient operations, which with conventional cable telemetry would have been nearly impossible. Processing the data gave good to excellent results, proving that rough terrain as such is not an obstacle to producing high quality 3D seismic. A video, recorded during these operations will be shown at the congress and this article provides additional information about this unique experience.

DE - DESCRIPTORS: Colombia-; data-acquisition; data-processing; geophysical-methods; geophysical-surveys; mountains-; petroleum-; petroleum-exploration; seismic-methods; slopes-; South-America; surveys-; terrains-; three-dimensional-models; urban-environment

CC - CATEGORY CODES: 20-Applied-geophysics; 29A-Economic-geology,-geology-of-energy-sources

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: illus. incl. sects., sketch map.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States

IS - ISSN: 1052-3812

AN - ACCESSION NUMBER: 1996-020645

UD - UPDATE CODE: 199608

Registro 4980 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Advances in imaging in the Colombian foothills.

AU - AUTHORS: Burke-N-L; Knapp-S

AF - AUTHOR AFFILIATION: BP Exploration, Bogota, Colombia

BK - BOOK TITLE: In: Society of Exploration Geophysicists, 64th annual international meeting; technical program, expanded abstracts with authors' biographies.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: SEG Annual Meeting Expanded Technical Program Abstracts with Biographies. 64; Pages 1651-1655. 1994.

PB - PUBLISHER: Society of Exploration Geophysicists. Tulsa, OK, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

CN - CONFERENCE INFORMATION: Society of Exploration Geophysicists, 64th annual international meeting. Los Angeles, CA, United States. Oct. 23-28, 1994.

LA - LANGUAGE: English

AB - ABSTRACT: Exploring for hydrocarbons in thrust-belt areas is one of the great challenges for seismic imaging. The Llanos foothills of Colombia combine both difficult mountainous terrain and complex geology. Application of appropriate technology in both the acquisition and processing of the data has led to a risk reduction in the exploration phase of the trend and greater confidence in the reserve base in the exploitation phase. Early seismic data (pre 1991) show large anticlinal structures, but do not permit accurate subsurface prediction. A significant effort over the past three years using state of the art acquisition and processing imaging technology has resulted in substantial improvements in the quality of the seismic data. Standard processing techniques are used for stacking the data; the imaging strategy includes both post-stack and pre-stack time and depth migrations. However, integration between acquisition, processing and interpretation, as well as between BPX staff and its contractors, is key to improving the data quality. By reviewing the procedures on a line from the Cupiagua field discovered in 1992, the differences that the new imaging techniques have made will be shown.

DE - DESCRIPTORS: Colombia-; Cusiana-Colombia; data-acquisition; data-processing; dip-moveout; faults-; forelands-; geophysical-methods; geophysical-surveys; imagery-; Llanos-; mountains-; petroleum-; petroleum-exploration; prestack-migration; seismic-methods; seismic-migration; South-America; stacking-; statics-; surveys-; terrains-; thrust-faults; wavelets-

CC - CATEGORY CODES: 20-Applied-geophysics; 29A-Economic-geology,-geology-of-energy-sources

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N043000; N060000; LONG: W0723000; W0733000.

IL - ILLUSTRATION: Refs: 1; 3 tables, sects., sketch map.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States

IS - ISSN: 1052-3812

AN - ACCESSION NUMBER: 1996-020651

UD - UPDATE CODE: 199608

Registro 4981 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Processing of seismic data from overthrust areas in Latin America; some success stories.

AU - AUTHORS: Mitchel-R-G; Tilander-N-G; Lattimore-R-K; Wuenscher-M-E; Ferguson-R-W

AF - AUTHOR AFFILIATION: Chevron Overseas Petroleum, San Ramon, CA, United States

BK - BOOK TITLE: In: Society of Exploration Geophysicists, 64th annual international meeting; technical program, expanded abstracts with authors' biographies.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: SEG Annual Meeting Expanded Technical Program Abstracts with Biographies. 64; Pages 1656-1657. 1994.

PB - PUBLISHER: Society of Exploration Geophysicists. Tulsa, OK, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

CN - CONFERENCE INFORMATION: Society of Exploration Geophysicists, 64th annual international meeting. Los Angeles, CA, United States. Oct. 23-28, 1994.

LA - LANGUAGE: English

AB - ABSTRACT: Chevron has several years of experience with processing seismic data from the eastern Andes and other overthrust areas where data quality has ranged from fair to non-existent in the past. These are areas where topography is often severe, near-surface velocity and geology are highly variable, and operating conditions are difficult. Data acquisition is expensive and in many cases costs have not been justified. However, recent processing projects have given encouragement that better and more cost-effective data quality can be achieved. Better data quality is related to several factors;-Data acquisition parameters must be chosen properly and acquisition must be done according to plan.-Compensating for the effects of the near-surface on reflection travel times is very important and must be done correctly for good data quality.-The processing datum should involve a minimum bulk static shift and should be CDP-consistent.-Velocity analysis and residual statics need to be done in ways that maximize signal/noise; multiple iterations may be necessary.-Finally, shortcoming in any of the steps leads to inferior data quality; careful quality control and interpreter input must be emphasized.